The accelerator pedal is not working properly. Especially when trying to go up hill. I have to keep pushing & letting go, pushing & letting go. even when it starts to move. Also, the right blade cuts lower than the right blade. It is a craftsman ys 4500 tractor.

You mention that you have to keep pushing / letting go of the accelerator. Is the engine RPM changing, or is the tractor surging, when you do this? What happens if you keep a steady pressure on the pedal? Isn't the throttle control via a lever on the panel?

Your uneven blade height can be caused by a multitude of issues. 1) If the spindles were changed, the wrong spindle may have been used on one side or the other.2) The wrong blade adapter has been used on one of the spindles.3) Mower deck has been bent4) Mower deck is binding. Try raising it all the way up, and lowering all the way down. See if the uneven cut changes at both levels (all up or all down).5) Blade is bent on one side, though this would usually cause such a ruckus and vibration it would be quite noticeable.6) Belt is slipping. Yes, sounds strange, but if blade speed changes significantly, then the position where the grass is actually cut changes because the grass can "lean over" more.7) Using a mulching attachment in tall grass can cause 1 blade to clog, and the cut grass that is swirling bends over other grass that needs to be cut.8) Mower deck support bracket has been bent9) Mower deck wheel has a bad bearing, and doesn't support the deck at same height as other side.10) Mower deck is cracked / bent at a support location11) You have lost a retaining pin at a support bracket and the bracket is loose.12) A spindle's bearings are worn out, and the spindle is "jumping" as it turns.

If the blades are directly beside each other where they blades will overlap, it is normal for a small amount of height difference to occur. But, most decks have off set blades, one slightly in front of the other.

you should be able to raise the deck all the way, and pull the tractor's front wheels up onto something (landscape timber?) to get more access, then measure blade height in relation to bottom of the deck. If different, then you are looking at wrong blade / adapter or a spindle issue. If the blades are the same height, then you are likely looking at a deck support issue / binding in linkage.

1 Suggested Answer

Hi,
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).click here to download the app (for users in the US for now) and get all the help you need. Good luck!

Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.

check the connection between the accelerator pedal and the pump as there are two different operations at work . The accelerator cable linkage may be loose and not giving full throttle where as the cruise control is getting full throttle.

The setting for clutch are not proper hence clutch is either slipping too much or sticking too much to clutch plate causing the engine to overload for every single rev. Both will effect the efficiency of your engine's exerting power especially going up hills. Use the manufacturers specification for clutch force and adjestment of pressure plate.

Try this to find out the condition of your clutch system:
In first gear and push accelerator fully to drive upto 3500 revs and then suddenly move your foot away from accelerator. If you feels a sudden shock and your head tends to nag to windscreen with a force then clutch adjestments are not properly done (stifting force is more than recommended). Inversly clutch is not engaging fully.

This could be a problem with plugs, wires, distributors, fuel filter or fuel injectors. Try changing the plugs and wires first, then the fuel filter. If you are changing the plugs and wires, make sue you use anti seizing compound and dielectric grease.